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lesya692 [45]
3 years ago
10

Using Models to Answer Questions About Systems

Chemistry
2 answers:
oksian1 [2.3K]3 years ago
8 0
^^ what he or she said
viva [34]3 years ago
5 0
1A: The legs can be a adjusted, as well as the sand can be swapped out. It’s a very good design for running multiple tests.
1B: He could add books or something under the front or back legs in order to increase/decrease the incline, therefore imitating the hypothesis.
1C: He can change out the sand grains to finer ones, or coarser ones, and record his results of each test.
2: If he sets the model at a steep incline and tests it with coarse sand and fine sand, seeing which one makes a narrower, deeper hole.
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The person was travelling 100 kph (kilometers per hour). Hope this helps :)
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State the trend, at standard pressure, of the boiling points of these
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A chemist examines an ionic compound that contains magnesium and one other element. She
Igoryamba

Group 7

Explanation:

The unknown element belongs to the seventh group on the periodic table of elements.

Ionic bonds are usually formed between metals and nonmetals. They formed by the transfer of electrons from the less electronegative specie to the more electronegative one.

The metals usually lose electron because they are highly electropositive species.

  • If we have a magnesium atom with two valence electrons.
  • To form ionic bonds, it must transfer the two electrons to another atom.
  • The other atom, a nonmetal must be ready to accommodate and receive the donated electrons.
  • This ensure that its own octet is complete.
  • Group 6 elements requires 2 electrons to have a complete octet.
  • They can receive the two electrons

But we were told that there are two atoms of that element for each of the magnesium atom;

  the atom must have a capacity of collecting one electron each to be stable.

Such atoms are found in Group 7 on the periodic table.

learn more:

Ionic bond brainly.com/question/6071838

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3 0
3 years ago
Help plisssssssssss I need helppp
Makovka662 [10]

Answer:

Explanation:

you would have to look more around the page, for example look at some ways that you can right down.

6 0
3 years ago
A student standardizes a solution of aqueous NaOH against a measured mass of solid potassium hydrogen phthalate. She then uses t
wlad13 [49]

Answer:

(D) Neither I nor II

Explanation:

The reagent potassium hydrogen phthalate is found in pure form and it is not partially hydrated .

The pallet form of NaOH ( solid form )  absorbs carbon dioxide gas from the atmosphere but NaOH in solution form does not absorb carbon dioxide .

Hence option D ) is right choice .

8 0
4 years ago
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